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Study on the Evolution of Mechanical Properties and Acoustic Emission of Medium-Permeability Sandstone under Multi-Level Cyclic Loading Stress Paths

文献类型：期刊论文

作者Xia, Debin1,2; Liu, Hejuan1,2; Liu, Jianjun1,2; Guo, Yintong1,2; Liu, Mancang3; Qiu, Xiaosong3; Li, Haibo4; Tan, Hongying5; Lu, Jun6
刊名PROCESSES
出版日期2024-08-01
卷号12期号:8页码:23
关键词underground gas storage triaxial compression mechanical properties acoustic emission damage evolution
DOI10.3390/pr12081773
英文摘要Depleted gas reservoirs are important natural gas storage media, thus research on the mechanical properties and damage evolution of reservoir rocks under alternating load conditions has significant practical implications for seal integrity studies. This paper conducted multi-level cyclic loading triaxial compression experiments on medium-porosity medium-permeability sandstone under different confining pressures and used acoustic emission (AE) instruments to detect the AE characteristics during the experiment, analyzing the mechanical characteristics, AE, and damage evolution characteristics. The experimental results show that after cyclic loading, the peak strength of sandstone increased by 14-17%. With the increase in the upper limit stress of cyclic loading, the elastic modulus showed a trend of first increasing and then gradually decreasing. The damage variable of rock samples rose with a rise in the upper limit stress of cyclic loading and confining pressure, and the rock damage was mostly localized at the peak stress. The AE b-value increased generally as confining pressure increased, showing that fractures occurred quicker and more unevenly at lower confining pressures. The distribution of RA-AF values shows that a sudden increase in stress causes the initiation and expansion of cracks in medium-permeability sandstone, and that tensile and shear cracks form continuously during the cyclic loading process, with shear cracks developing more pronounced. This research can provide some theoretical guidance for the long-term stable operation and pressure enhancement expansion of depleted gas reservoir storage facilities.
资助项目Young Scientists Fund of the National Natural Science Foundation of China ; Open Foundation of China National Petroleum Corporation Science and Technology Research Institute Limited[RIPED.CN-2023-JS-580] ; Open Research Fund of State Key Laboratory of Geo-mechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences[SKLGME022020] ; [52204076]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001305804100001
出版者MDPI
源URL[http://119.78.100.198/handle/2S6PX9GI/42471]  
专题中科院武汉岩土力学所
通讯作者Liu, Mancang
作者单位1.Chinese Acad Sci, Inst Rock & Soil Mech, Wuhan 430071, Peoples R China
2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
3.Key Lab Underground Storage Oil & Gas Engineer Chi, Langfang 065007, Peoples R China
4.PetroChina Co Ltd, Res Inst Petr Explorat & Dev, Beijing 100083, Peoples R China
5.Chongqing Univ, State Key Lab Coal Mine Disaster & Control, Chongqing 400044, Peoples R China
6.Shenzhen Univ, Inst Deep Earth Sci & Green Energy Coll Civil & Tr, Shenzhen 518060, Peoples R China
推荐引用方式
GB/T 7714		 Xia, Debin,Liu, Hejuan,Liu, Jianjun,et al. Study on the Evolution of Mechanical Properties and Acoustic Emission of Medium-Permeability Sandstone under Multi-Level Cyclic Loading Stress Paths[J]. PROCESSES,2024,12(8):23.
APA Xia, Debin.,Liu, Hejuan.,Liu, Jianjun.,Guo, Yintong.,Liu, Mancang.,...&Lu, Jun.(2024).Study on the Evolution of Mechanical Properties and Acoustic Emission of Medium-Permeability Sandstone under Multi-Level Cyclic Loading Stress Paths.PROCESSES,12(8),23.
MLA Xia, Debin,et al."Study on the Evolution of Mechanical Properties and Acoustic Emission of Medium-Permeability Sandstone under Multi-Level Cyclic Loading Stress Paths".PROCESSES 12.8(2024):23.

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来源：武汉岩土力学研究所

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